Unified Vietnam, International Children Day, March 20th, 1978, Michel Nr. 1103; A single stamp with a 12 xu nominal was issued in perforation 11.0.
Rare registered letter sent from Quang 5 (Cholon) in January of 1982 to Klewitz. It features a pair of the stamp. Note the same color variations and production flaws (omitted colors) on the flower stamps. Errors stamps on postally used cover are very rare. The overall postage (which includes two red free franks for a postage of 6.30 Dong) amounted to 7.85.
Rare registered express mail letter sent to Klewitz in October of 1980. It carries the entire set plus one of the 5 xu Day of the Child stamps for an overall postage of 4.81 Dong. Fulda arrival cancel on the reverse. Green Fulda custom cachet on front. Unusual hand-made express mail label.
Registered letter sent from Quan 5 (Cholon) to Klewitz in December of 1981. The letter carries the higher values of the perforated Mammal set plus three of the 5 Dong Day the Child stamps for an overall postage of 7.95 Dong.
Registration Nr. 102650